These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Portal 3
Big Lipped Alligator Moment - After Chell leaves to rescue Wheatley, some detectives investigate her lab and start making suggestive poses that distract the narrator.
The "Sniper's Portal Gun" being one of those working, and awesome, inventions.
Crowning Music of Awesome - "One-Eyed Maestro" when Chell is testing out the gels, and "In a Heartbeat" during a montage of Chell rescuing Wheatley/PERcy digging up Cave Johnson's body.